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LD 18

REQ new
TYPE ght
LSNO
CUST 0
DNSZ 4 (max. size of entered DN's)
SIZE x (number of DN's, size of list)
WRT yes
STOR 0
WRT yes
...

LD 57

REQ chg
TYPE ffc
CUST 0
FFCT
CODE pldn
PLDN
HTYP rrb
CFWI
MQUE
PLDN
CODE

LD 20

REQ prt
TYPE ght
LSNO?

LD 18

REQ chg
TYPE ght
LSNO?
PLDN __result of LD 20__
DNSZ __size of list__
STOR x yyyy
x = sequence number, starting with 0
yyyy = DN